JPH0528835B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an improved dot matrix light-emitting display constructed using light-emitting elements such as light-emitting diodes, and a method for manufacturing the same.

BACKGROUND TECHNOLOGY This type of light-emitting display is one in which arbitrary characters, symbols, patterns, etc. are displayed in the form of a dot pattern by energizing and lighting up any of the light-emitting elements arranged in a matrix. .

The basic structure of such a dot matrix light-emitting display is disclosed, for example, in a patent application proposed by the present applicant.
No. 59-178797.

In this device, light-emitting elements composed of light-emitting diodes and the like are arranged in multiple rows at the overlapping portion of a plurality of upper electrode strips and lower electrode strips that are arranged in a three-dimensional lattice shape with an insulating layer in between. It has a structure that allows for

Incidentally, such a dot matrix light-emitting display is produced by etching the upper and lower surfaces of a copper-clad laminate having a predetermined size to form upper and lower electrode strips to form a matrix composite substrate. On the matrix composite substrate, light-emitting elements made of semiconductor chips are attached one by one to the overlapping portion of the lower electrode strips by a method such as bonding, and a large number of light-emitting elements are arranged in a multi-row structure (matrix-like structure). )
Finally, the upper surface of the matrix substrate is coated with a transparent thermosetting resin to form a protective film to obtain a finished product.

Problems to be Solved by the Invention However, when manufacturing a dot matrix light-emitting display by the above-described method, the work area becomes wide because it is necessary to attach the light-emitting elements one by one to the entire surface of the matrix composite substrate. As a result, it is inevitable that the manufacturing equipment will become larger and more complex, and moreover, the light-emitting elements attached to the matrix composite substrate may be damaged during the work, the bonding wires may be cut, and defects may occur in the light-emitting part, or the manufacturing equipment may become larger and more complex. If the light-emitting elements themselves have variations in brightness, the matrix composite substrate as a whole will be a defective product, causing problems such as large losses during manufacturing.

Therefore, the technical problem of the present invention is to solve the above-mentioned problems, and in particular, to simplify the manufacturing operation,
An object of the present invention is to provide a dot matrix light-emitting display with high yield and a method for manufacturing the same.

Means for Solving the Problems In order to solve the above problems, the present invention has the following features.
A matrix composite substrate for a dot matrix light-emitting display having the characteristics shown in (1) to (4) and a method for manufacturing the same are provided.

(1) One insulating substrate on which a plurality of electrode strips of one polarity are arranged parallel to each other in multiple rows on the surface, and an insulating substrate connected to the electrode strips on the insulating substrate side through through holes. It is composed of a plurality of segment bodies provided with a light emitting part that forms a conductive part that is separated from the electrode strip of the other polarity by a part, and each of the plurality of segment bodies has a conductive part separated from the electrode strip of the other polarity. The formed electrode strip is
When aligned and arranged on the upper surface of the one insulating substrate so as to intersect with the corresponding electrode strips formed on the one insulating substrate in a three-dimensional lattice pattern, the conductive parts formed in each light emitting part are arranged on the upper surface of the one insulating substrate. A matrix composite substrate in a dot matrix light emitting display having a structure connected to electrode strips on the insulating substrate side through through holes.

(2) A single insulating substrate on which a plurality of electrode strips of one polarity are arranged in multiple rows parallel to each other on the surface thereof, and connected to the electrode strips on the insulating substrate side through through holes, and A method for manufacturing a matrix composite substrate by aligning and arranging a plurality of segment bodies each having a light-emitting part forming a conductive part separated from an electrode strip of the other polarity by an insulating part, the method comprising: The electrode strips formed on these segment bodies are connected to each other.
The electrode strips are sequentially aligned and arranged on the upper surface of the one insulating substrate so as to intersect with the corresponding electrode strips formed on the one insulating substrate in a three-dimensional lattice shape, and at this time,
A method for manufacturing a matrix composite substrate in a dot matrix light emitting display, characterized in that a conductive part formed in each light emitting part is connected to a corresponding electrode strip on the insulating substrate side through the through hole.

(3) A plurality of segment bodies provided with a light-emitting portion that is connected to the electrode strip on the insulating substrate side through a through hole and that forms a conductive portion that is separated from the electrode strip of the other polarity by an insulating portion. and conductive strips corresponding to the number of light emitting parts formed on this segment body, and each of the plurality of segment bodies has a structure in which the electrode strip formed on these segment bodies is connected to the conductive strip material. and intersect in a three-dimensional grid pattern,
A matrix composite substrate in a dot matrix light emitting display having a structure in which a conductive part formed in each light emitting part is connected to a corresponding part of the conductive strip by the through hole.

(4) A plurality of segment bodies provided with a light-emitting part forming a conductive part connected to the electrode strip on the insulating substrate side by a through hole and separated from the electrode strip of the other polarity by an insulating part. A method for manufacturing a matrix composite substrate by aligning and arranging the above on a conductive strip according to the number of light emitting parts formed on the segment body, the method comprising: aligning each of the plurality of segment bodies on the segment bodies; The formed electrode strips are aligned and arranged so as to intersect with the conductive strips in a three-dimensional lattice pattern, and at this time, the conductive portions formed in each light emitting section are connected to the corresponding portions of the conductive strips through the through holes. A method for manufacturing a matrix composite substrate in a dot matrix light emitting display, characterized in that the matrix composite substrate is connected to a dot matrix light emitting display.

Here, the inventions described in (1) to (4) above all have segment bodies as essential components,
The purposes and effects of the inventions are also common.

Functions and Effects of the Invention Since the dot matrix light-emitting display of the present invention has the above-mentioned characteristics, the following unique functions and effects can be achieved due to its structural characteristics.

(1) A matrix composite substrate has a plurality of segment bodies each having a light emitting element attached in advance to each light emitting part.
One insulating substrate or a plurality of conductive strips are bonded and arranged, and one of the divided parts of the conductive part formed in the light emitting part of each segment body is connected to one insulating substrate or a plurality of conductive strips. Since the electrode strips of the conductive strips are connected to each other, there is a risk of damaging the light emitting elements or breaking the bonding wires during manufacturing of the matrix composite substrate, causing defects in the light emitting parts, or causing defects in the light emitting parts during manufacturing. Even if there is variation in the brightness of the light emitter elements, it is sufficient to simply replace the segment body.
This reduces losses during manufacturing,
A dot matrix light-emitting display with a good overall yield can be obtained.

(2) Further, according to the manufacturing method of the present invention, the matrix composite substrate includes a plurality of segment bodies each having a light emitting element attached to each light emitting part in advance, on a single insulating substrate or a plurality of conductive strips. After aligning and arranging, one of the divided parts of the conductive part formed in each light emitting part of the segment body is attached to each of the electrode strips of one insulating substrate or to a plurality of conductive strips. Compared to the conventional method of attaching a large number of light emitting elements one by one to a matrix composite substrate of a predetermined size, the light emitting elements only need to be attached to small-sized segment bodies. Since the work range required for attaching the body element can be significantly reduced, the size of the manufacturing apparatus itself can be reduced, and the manufacturing method can also be simplified.

(3) In addition, the light emitter elements only need to be attached during the segment body formation process and are not required during the subsequent assembly process. Since the assembly process can be carried out completely separately, so-called division of labor becomes possible, which has the advantage of significantly improving mass productivity.

Embodiments of the invention Examples of the first group of inventions are shown in FIGS. 1 to 6.

As seen in these figures, the dot matrix light emitting display of the present invention has a plurality of electrode strips 11a on the surface.
An insulating substrate 11 in which are arranged in multiple rows parallel to each other.
and a plurality of segment bodies 1 provided with at least one or more electrode strips 1a constitute a matrix composite substrate A, and each of the segment bodies 1 has a light emitting section to which a light emitting element 3 is attached. Each of the conductive parts formed in 2 is divided into a plurality of parts by an insulating part 7.

Here, one electrode strip 11a provided on the insulating substrate 11 and the other electrode strip 1a provided on the segment body 1 are such that the segment body 1 is provided on the insulating substrate 11.
When the electrode strips 11a and 1a are aligned and bonded to each other in a planar manner on the upper surface, they are arranged in a relation that they are aligned in a three-dimensional lattice shape, and are divided by the insulating portion 7 as described later. A light emitting part 2 is formed by attaching a light emitting element 3 to a cross-shaped conductive part 5, which is one of the conductive parts.

The insulating substrate 11, which is a component of the matrix composite board A, is made of a material such as a copper-clad laminate formed by pasting copper foil on the surface of a glass epoxy or paper phenol resin board, and the electrode strips 11a are pasted. It is formed by removing a portion of the copper foil by photo-etching or the like.

Each of the segment bodies 1 is also made of the same material, and the insulating part 7 formed in the light emitting part 2 and the insulating strip 1c formed at the side end are also pattern-etched on a part of the copper foil attached. Formed by exfoliation.

FIG. 2 shows the structure of the light emitting section 2 formed on the matrix composite substrate A having such a structure.
FIG. 3 is a longitudinal cross-sectional structural view of that part.

In the figure, 7 is an insulating part formed to divide the conductive part of the light emitting part 2 into a plurality of parts (two in the example shown).

The cross-shaped conductive part 5 left inside the insulating part 7 by the above-described pattern etching process of the copper-clad laminate is plated, and the electrode strip 1a outside the insulating part 7 is plated. A corresponding portion is plated in a ring shape to form a ring-shaped conductive portion 4.

On the other hand, 3 is a semiconductor chip whose lower part is fixed to the upper surface of the cross-shaped conductive part 5 with silver paste 9, etc., and then the tip of a bonding wire 8 pulled out from the upper part is connected to the ring-shaped conductive part 4 described above. Connected.

The cross-shaped conductive part 5 has a through hole 6 formed in its center, and is electrically connected to a conductive part 6' formed on the back surface of the segment body 1.

In the embodiment, only the segment body 1 provided with one electrode strip 1a has been described, but the number of electrode strips 1a may be increased to two or more.

Next, the manufacturing method of the present invention will be explained.

The steps of the manufacturing method of the present invention are well illustrated in FIG.

This manufacturing process consists of a step of forming segment bodies and an assembly process of assembling and bonding the segment bodies to an insulating substrate.

That is, in the segment forming step, a copper clad laminate 10 having dimensions equal to those obtained by dividing the dot matrix light emitting display A to be obtained into predetermined sizes is used as a material, and copper bonded to the surface of the copper clad laminate 10 is used as a material. The foil 10a is pattern-etched to form an insulating section 7 in a portion corresponding to the light emitting section 2, and an insulating strip 1c at the side end. In addition, 10b shown in the figure
1 shows an insulating portion of a copper-clad laminate 10 made of glass epoxy, paper phenolic resin, or the like.

Next, the outside of the cross-shaped conductive portion 5 and insulating portion 7 is plated. In this case, the entire surface of the cross-shaped conductive portion 5 is plated with silver or gold, but the outside of the insulating portion 7 is plated in a ring shape. After that, the light emitter elements 3, 3 are coated with silver paste 9.
etc., as shown in FIG. Form.

In the step of assembling and joining the segment bodies 1 to the insulating substrate 11, the plurality of segment bodies 1 formed as described above are attached to the insulating substrate 11 formed in advance according to the size of the dot matrix light emitting display A to be obtained. The conductive parts 6' arranged on the upper surface and provided on the back side of the segment body 1 are attached to the electrodes 11a formed on the surface of the insulating substrate 11 using silver paste or the like, and the segment body 1 is attached to the surface of the insulating substrate 11. Make a consistent arrangement.

That is, as shown in FIG. 4, the segment body 1 is placed on the insulating substrate 11 such that the electrode strips 1a of the segment body 1 are aligned with the electrode strips 11a of the insulating substrate 11 in a three-dimensional grid pattern. They are arranged one after another in a plane and fixed so as to completely cover the insulating substrate 11 on the upper surface of the insulating substrate 11.

After obtaining the target matrix composite substrate A in this way, the upper surface of the matrix composite substrate A is coated with a linear translucent thermosetting resin to form a sealing film, or a fifth As shown in the figure, an insulating plate 14 having through holes 14a corresponding to the light emitting parts 2 is bonded to the upper surface of the matrix substrate A, and finally, transparent heat is emitted from each through hole 14a of the insulating plate 14. A sealing film 15 is formed by pouring a curable resin.

In the case where the sealing film 15 is formed in the latter manner, the insulating plate 14 is formed on the matrix composite substrate A.
In order to prevent the occurrence of defects such as distortion and cracks that occur during heating of the matrix substrate A, a material with thermal expansion characteristics similar to that of the material of the insulating part of the matrix substrate A, or a material that is free from the thermal expansion of the matrix substrate A is used. A flexible material that can freely expand and contract is preferably used.

FIG. 6 shows a vertical cross-sectional structural view of the light emitting section 2 of the dot matrix light emitting display B formed in this manner.

Next, embodiments of the second group of inventions will be described.

7 to 10 show embodiments of the second group of inventions.

The feature of this second group of inventions is that the segment bodies 1 are commonly connected by each of a plurality of conductive strips 12 to form a matrix composite substrate A, and as shown in FIG. The conductive portion formed in each light emitting portion 2 of the segment body 1 is divided into a cross-shaped conductive portion 5 and an electrode strip 1a portion by an insulating portion 7, as in the first group of inventions. The cross-shaped conductive portion 5 is commonly connected to each of the plurality of conductive strips 12.

Parts corresponding to those in the first group of inventions are given the same reference numerals and their explanations are omitted, but Fig. 8 is an enlarged view showing the light emitting part, and Fig. 9 is a vertical cross-sectional structural diagram of the light emitting part. It is something.

FIG. 10 shows the manufacturing process of the second group of inventions.

The process of forming the segment body 1 is the same as that of the first group of inventions, so a description thereof will be omitted.The assembly process of assembling and joining the segment body 1 to a plurality of conductive strips 12 will be explained.
The matrix composite substrate A is formed by aligning and arranging the electrode strips 1a on the conductive strips 12 corresponding to the number of the light emitting sections 2, and connecting the respective electrode strips 1a to the conductive strips 12 in common.

During actual manufacturing, a plurality of segment bodies 1 are turned over and arranged in alignment, and a conductive part (not shown, a cross-shaped conductive part 5 and a through hole 6 provided on the back side of each segment body 1) A matrix composite substrate A is formed by fixing the conductive strips 12 to each of the plurality of conductive strips 12 one after another using silver paste or the like.

In order to prevent the matrix composite substrate A formed in this way from producing defects such as distortion and clutching when heated, it is necessary to provide an appropriate gap 1d between the arranged segment bodies 1. desirable.

Thus, the formed matrix composite substrate A
Insulating plate 1 is prepared in the same manner as in the first group of inventions.
It goes without saying that the dot matrix light-emitting display B is manufactured by coating 4.

In addition, in the above embodiment, only the segment body 1 provided with one electrode strip 1a was described;
Similar to the first group of inventions, the number of electrode strips 1a may be increased to two or more.

FIGS. 11 and 12 show other examples of segment bodies used in the present invention.

That is, what is shown in these figures has a structure in which the conductive part formed in the light emitting part 2 of one electrode strip 1a is divided by two insulating parts (strips) 15 and 16. As shown in the figure, the conductive parts formed in the light emitting part 2 are parts 18 and 1 to which the semiconductor chip 3 is attached using silver paste 9 or the like.
9, and a portion 17 to which the bonding wire 8 is connected from the top of the semiconductor chip 3. The light emitting part 2 is divided by a circle C to distinguish it from other parts of the electrode strip 1a.
The inside of each is decorated with metal plating.

Through-holes 6 are formed in the conductive parts 18 and 19 existing outside this circular portion C to provide electrical continuity to the conductive part (not shown) formed on the back side of the segment body 1. (not shown) are fixed by applying silver paste to electrode strips 11a arranged in multiple rows parallel to each other on the surface of an insulating substrate 11 placed below.

Although no example is shown in which the matrix composite substrate A is constructed by using the conductive strip 12 as described in the embodiments of the second group of inventions instead of the insulating substrate 11, the same procedure can be used in this case as well. It goes without saying that it is possible.

In any of the above-mentioned embodiments, the current-carrying terminal of the light-emitting part 2 is not shown, but in the actual matrix composite board, the current-carrying terminal of the light-emitting part 2 is provided on the back side of the matrix composite board A. The structure is such that it is connected to an external power source using the illustrated connector or the like, and therefore the electrode strips 1a of the segment body 1 are guided to the back side of the matrix composite board A by the lead wiring pattern.

[Brief explanation of the drawing]

1 to 6 show examples of the first group of the present invention, in particular, FIG. 1 is a perspective view of the matrix composite substrate, FIG. 2 is an enlarged view of its light emitting part, and FIG.
4 shows a manufacturing process diagram of the matrix composite substrate, FIG. 5 shows a completed dot matrix light-emitting display, and FIG. 6 shows a vertical cross-sectional structural diagram of the light emitting section. In addition, Figures 7 to 10 are
7 is a perspective view of the matrix composite substrate, FIG. 8 is an enlarged view of the light emitting part, FIG. 9 is an enlarged vertical cross-sectional view of the light emitting part, and FIG. shows a manufacturing process diagram of the matrix composite substrate. Furthermore, FIG. 11 and FIG. 12 are diagrams of other embodiments of the segment body applicable to any of the above groups of inventions, and FIG. 11 shows a matrix composite substrate formed using the segment body. FIG. 12 is a perspective view of one embodiment showing the overall structure, and FIG. 12 is an enlarged view of the light emitting section. Explanation of symbols: In the figure, A is a matrix composite substrate, B is a dot matrix light emitting display, 1 is a segment body, 1a is an electrode strip thereof, 2 is a light emitting part, 1
Reference numeral 1 denotes an insulating substrate, 11a its electrode strip, 12 a conductive strip, and 3 a light emitting element.

Claims (1)

[Scope of Claims] 1. One insulating substrate on which a plurality of electrode strips of one polarity are arranged in multiple rows parallel to each other on the surface thereof, and connected to the electrode strips on the insulating substrate side through through holes. and a plurality of segment bodies provided with a light-emitting part forming a conductive part separated from the electrode strip of the other polarity by an insulating part, each of the plurality of segment bodies When the electrode strips formed on the segment body intersect the corresponding electrode strips formed on the one insulating substrate in a three-dimensional lattice shape, and are aligned and arranged on the upper surface of the one insulating substrate. A matrix composite substrate in a dot matrix light emitting display, wherein the conductive parts formed in each light emitting part are connected to the electrode strips on the insulating substrate side through the through holes. 2. On one insulating substrate on which a plurality of electrode strips of one polarity are arranged in multiple rows parallel to each other on the surface,
A plurality of segment bodies each having a light emitting part connected to the electrode strip on the insulating substrate side through a through hole and forming a conductive part separated from the electrode strip of the other polarity by an insulating part are aligned and arranged. A method of manufacturing a matrix composite substrate by forming each of the plurality of segment bodies, wherein the electrode strips formed on these segment bodies are three-dimensionally connected to the corresponding electrode strips formed on the one insulating substrate. The conductive parts formed in each light emitting part are connected to the corresponding electrode strips on the insulating substrate side through the through holes. A method for manufacturing a matrix composite substrate in a dot matrix light emitting display, characterized in that the matrix composite substrate is connected to a dot matrix light emitting display. 3. a plurality of segment bodies provided with a light emitting part forming a conductive part connected to the electrode strip on the insulating substrate side by a through hole and separated from the electrode strip of the other polarity by an insulating part; The segment body is composed of a combination of conductive strips corresponding to the number of light emitting parts formed on the segment body, and each of the plurality of segment bodies is configured such that the electrode strip formed on these segment bodies is in a three-dimensional relationship with the conductive strip. A matrix composite substrate in a dot matrix light-emitting display having a structure in which conductive parts formed in each light-emitting part are connected to corresponding parts of the conductive strip by the through-holes so as to intersect in a grid pattern. 4. A plurality of segment bodies each having a light emitting part connected to the electrode strip on the insulating substrate side through a through hole and forming a conductive part separated from the electrode strip of the other polarity by an insulating part, A method for manufacturing a matrix composite substrate by aligning and arranging light emitting parts on a conductive strip according to the number of light emitting parts formed on the segment bodies, the method comprising: forming each of the plurality of segment bodies on a conductive strip according to the number of light emitting parts formed on the segment bodies; The electrode strips are aligned and arranged so as to intersect with the conductive strips in a three-dimensional lattice shape, and at this time, the conductive parts formed in each light emitting part are connected to corresponding locations of the conductive strips by the through holes. A method for manufacturing a matrix composite substrate in a dot matrix light emitting display, characterized in that: